Worried that Nvidia stock has lost its momentum? These other stock-split stocks could offer better upside.Stock splits don't do anything to change the fundamentals of a business, but it's not hard to see why some investors have been paying attention to them lately. By dividing its stock into a larger number of shares, a company brings the price per share down and makes investing more psychologically appealing and accessible for some investors. Sometimes, this can help power substantial valuation gains, but ...